It seems you’re referring to a specific, possibly special or side chapter of One Punch Man (Chapter 154.6). As of my last update in October 2023, there isn’t any detailed information about a chapter numbered 154.6 in the official releases.
In One Punch Man Chapter 3, Saitama and Genos take the Hero Association’s entrance exam. The physical exam is a breeze for Saitama, whose exceptional strength shocks the examiners. But his written test is another matter entirely
Chapter 82 continues to escalate the intense battles inside the Monster Association’s lair, focusing on strategic fights, character reveals, and building tension as heroes push further into enemy territory
In Chapter 51 of One Punch Man (illustrated by Yusuke Murata), the intense battle between Garou and the group of A-Class and B-Class heroes, led by Death Gatling, continues and reaches its climax.
One‑Punch Man manga Chapter 43, titled “Don’t Look Down on Heroes!” (Viz: “Don’t Dis Heroes!”) from the Blizzard Group Arc
Chapter 54 of One Punch Man (illustrated by Yusuke Murata, based on ONE’s original webcomic) continues building up the Monster Association Arc, escalating the tension between monsters and heroes, while spotlighting Garou and introducing more key monsters.
